ServeRAID tape on second bus not detected - Ubuntu

This is a discussion on ServeRAID tape on second bus not detected - Ubuntu ; Hello,
i installed Ubuntu Dapper (actually OpenExchange Express) on a IBM xSeries 225 server.
Everything works fine except of the tape drive connected to the second bus of the ServeRAID-5i card.
The tape drive is not detected on boot:
[42949379.560000] ...